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Project Euler

Challenging maths and programming puzzles to sharpen problem solving.

Visit Project Euler4.7
  • Rating

    4.7 / 5

  • Pricing

    Free

  • Difficulty

    Advanced

  • Works on

    Web

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What is Project Euler?

Project Euler is a long-running collection of hundreds of mathematical problems that need both maths insight and a little code to solve. It is free, you can use any programming language, and your progress is tracked as you work through problems of rising difficulty.

Pros: what Project Euler does well

  • Hundreds of clever problems
  • Any language works
  • Very satisfying progress

Cons: where it falls short

  • Gets very hard quickly
  • Plain, text-only site

Who Project Euler is for

Programmers and students who enjoy maths puzzles and want to sharpen their skills.

Who can skip it

Beginners looking for guided coding lessons.

Project Euler alternatives

Not sold on Project Euler? These do a similar job, and each card says what it has in common.

Math is Fun

Focus: education and worksheets. Shares maths and puzzles with Project Euler. Rated 4.6 (Project Euler: 4.7).

WebsiteFreeWeb

Blockly Games

Focus: coding for kids and education. Shares programming and puzzles with Project Euler. A web app, not a website. Rated 4.6 (Project Euler: 4.7).

Web AppFreeWeb

Regex Crossword

Focus: regex and games. Shares puzzles and programming with Project Euler. A web app, not a website. Rated 4.5 (Project Euler: 4.7).

Web AppFreeWeb

Advent of Code

Focus: coding puzzles, practice and challenges. Shares programming with Project Euler. Rated 4.8 (Project Euler: 4.7).

WebsiteFreeWeb

Khan Academy

Focus: online courses, science and education. Shares maths with Project Euler. Adds iOS and Android. Rated 4.8 (Project Euler: 4.7).

WebsiteFreeWeb, iOS

Lichess

Focus: chess, strategy and open source. Shares puzzles with Project Euler. Adds iOS and Android. Rated 4.8 (Project Euler: 4.7).

WebsiteFreeWeb, iOS

Free alternatives to Project Euler

Want to spend nothing? These free picks cover similar ground.

PhET

Focus: science, simulations and education. Shares maths with Project Euler. Rated 4.8 (Project Euler: 4.7).

WebsiteFreeWeb

Teach Yourself CS

Focus: computer science, self taught and study plan. Shares programming with Project Euler. Same 4.7 rating.

WebsiteFreeWeb

BetterExplained

Focus: calculus, intuition and explainers. Shares maths with Project Euler. Rated 4.6 (Project Euler: 4.7).

WebsiteFreeWeb

Devhints

Focus: cheatsheets, reference and github. Shares programming with Project Euler. Rated 4.6 (Project Euler: 4.7).

WebsiteFreeWeb

Omni Calculator

Focus: calculator, finance and conversions. Shares maths with Project Euler. Adds iOS and Android. Rated 4.6 (Project Euler: 4.7).

WebsiteFreeWeb, iOS
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